Change your team name from the Settings page
The Settings page is where you manage your team's configuration, including the team name. Only admins can make changes to team settings.
In the sidebar, click Settings. This opens the Team Settings page.
Under the General section, find the Team name field. Edit the name — it can be up to 100 characters.
Click Save. The button is enabled only when you've made a change. Once saved, the new name appears throughout the app, including in the sidebar.